138898075 has 48 divisors (see below), whose sum is σ = 194987520. Its totient is φ = 97528320.

The previous prime is 138898043. The next prime is 138898099. The reversal of 138898075 is 570898831.

138898075 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 138898075 - 2⁵ = 138898043 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 831642 + ... + 831808.

It is an arithmetic number, because the mean of its divisors is an integer number (4062240).

Almost surely, 2^138898075 is an apocalyptic number.

138898075 is a deficient number, since it is larger than the sum of its proper divisors (56089445).

138898075 is a wasteful number, since it uses less digits than its factorization.

138898075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316 (or 311 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 49.

The square root of 138898075 is about 11785.5027470193. The cubic root of 138898075 is about 517.8835014272.

The spelling of 138898075 in words is "one hundred thirty-eight million, eight hundred ninety-eight thousand, seventy-five".